diff --git a/Doc/lib/liboptparse.tex b/Doc/lib/liboptparse.tex
index f2d2d8cb3c9..475c4f451db 100644
--- a/Doc/lib/liboptparse.tex
+++ b/Doc/lib/liboptparse.tex
@@ -1711,5 +1711,5 @@ are present after parsing:
 \verbatiminput{required_2.py}
 
 \begin{seealso}
-  \seemodule{getopt}{More traditional Unix-style command line option parsing}
+  \seemodule{getopt}{More traditional \UNIX-style command line option parsing.}
 \end{seealso}